Teat-cup.



0. ANDERSON.

TEAT CUP.

APPLICATION FILED SEPT. 5, 1914.

Patented J an. 11, 1916.

FIG- L:

I Inventor @Sm |fl2a$bn OSCAR, ANDERSON, 0F LANCASTER, PENNSYLVANIA.

rear-our.

Specification of Letters Patent.

Patented J an. 11., 1916..

Application filed September 5, 1914. Serial No. 860,488.

To all "whom it may concern Be it known that I, OSCAR ANDERSON, acitizen of the United States, residing at Lancaster, in the county ofLancaster, ,State of Pennsylvania, have invented a Teat-Cup, of whichthe following is a specification.

The method or improvement set forth in this specification relates tothat class of milking machines in which the teat is subjected to suctionand to intermittent squeezing. In machines of this type heretofore usedit is necessary to use both a vacuum and a pressure pump as well as onepipeline for vacuum and one for pressure and other parts in duplicate,to get satisfactory results. v

The primary object of my invention is to eliminate the use of pressurepump, pipe line and other duplicate parts heretofore used and also tocreate different degree of pressure on different teats at the same timefrom a constant pressure such as the atmospheric. By this arrangement mymilking machine will be more applicable to different cows, as all cowsdo not respond well to the same degree of squeezing of the teat whenmilked. Besides this the machine is simpler and easier to handle andrequires less power to operate as will be understood.

My method consists in concentrating the atmospheric pressure or a lowpressure on a large surface to act as a higher pressure on a smallersurface.

In teatcups heretofore used a small and quite flexible rubber sleeve hasbeen employed to squeeze the teat, so it has, when under pressure, takenthe shape of the teat it inclosed, pressing equally on all sides. Inthat construction the atmospheric pressure is insufficient to givesatisfactory result so more than atmospheric pressure had to be resortedto.

In my method, I use in my preferred construction of the teatcup, stiff,yet flexible sleeve, which squeezes either directly or indirectly on theteat. 'The sleeve .when under partial vacuum from inside, will collapse,but is so stiff as not to follow the shape of the inclosed teat, butflattened out over it will present a much larger surface to the pressurefrom the outside thus increasing the pressure on the teat.

To avoid unnecessary waste of energy to collapse the sleeve I reduce thethickness of a comparatively I and 4:.

the wall on two opposite-points lengthwise as will be explainedhereafter.

My improvement is illustrated in accompanying drawing in. which likenumerals of reference indicate corresponding partsin each of the severalfigures.

Figure l is a verticalsectional view of a teatcup taken at line C Fig.2. Fig. 2 is a cross section taken at line A Fig. 1. Fig. 3 1s a sectionlike Fig. 1, showing the teat squeezed. Fig. 4 is a cross section takenat line B Fig. 3.

In Fig. 1 a, is a rigid outer shell; I), is a flexible sleeve; 0, is apreferablytransparent funnel shaped bottom terminating in a duct ornipple 0. At the top of shell a, is'a rigid extension (I, which iscontracted at one end to form passage for the teat. On side of shell a,is a hose nipple f, for admitting suction and pressure alternatelybetween shell a, and sleeve b.

In assembling the teatcup, sleeve 72, is placed inside shell a; the endsof sleeve I) being thinner than the middle and of uniform thickness areturned over the ends of shell a, the bottom 0, is then placed over thelower end and top piece (I, over the upper; the ends of sleeve 6are'then turned over again as at I). An independent and airtight jointis thus formed for each end of the compartment between the shell and thesleeve in the simplest possible manner.

Shell (1, is round in cross-section at its ends as far as sleeve 6 isfolded over same and between has the form shown in Figs. 2 and 4. SleeveZ) may be cylindrical in its general outline as shown in Figs. 1 and 2,except a reduced thickness in its Wall on opposite sides as at g.

In operation the teatoup is connected by a hose from duct 0 to a milkreceptacle under partial vacuum. Nipple f is by a hose connected to apulsator or means to alternately admit suction and atmospheric pressurebetween shell a. and sleeve 7;. The cup is then placed under the end ofthe teat and suction turned on through both ducts c and f; the suctiondraws the teat into proper place inthe cup. (The position of sleeve b isshown in Figs. 1 and 2.)

When suction is cut off from nipple f and atmospheric pressure isadmitted, sleeve 6 collapses over the teat as shown in Figs. 3 It willbe noticed that the outside surface of sleeve 6 is larger than thesurface of the teat it squeezes. I have thus concentrated a low pressureon the'outside of the sleeve to act as a higher pressure on the teat. Bymaking the outside surface of sleeve b larger or smaller I can vary the"pressure on the teat, from a constant outside pressure. The alternateapplication of suction and pressure through nipple f will alternatelyrelieve and squeeze the teat thus draw the milk as Will be understood.

Other features may be used in connection With this improvement. Forinstance, such as described in my Patent No. 1,113,943, Oct. 20, 1914.

Iclo not Wish to limit-myself to any precise construction to accomplishmy object as set forth in this application.

Having described my invention I claim:

.1. In a milking machine subjecting the teat to steady suction andintermittent squeezing, means for concentrating atmospheric pressure togive a greater effective squeezing pressure on the teat and means tointermittently relax said pressure by suction.

lateness 2. In a milking machine teatcup subjecting the teat to steadysuction and intermittent squeezing, means whereby a low fiuicl pressurecan be concentrated to give a greater proportionate degree of squeezingon the teat, and means to relax said squeezing by suction. 3. In amilking machine teatcup subjecting the teat to steady'suction andintermittent squeezing means Within the teatcup, whereby the atmosphericpressure may be concentrated to give a greater proportionate degree ofsqueezing on the teat.

4. In a milking machine subjecting the teat to steady suction andintermittent squeezing, means adapted to convert a low outside pressureto a higher pressure on the teat and means to intermittently relax thesqueezing Without interrupting the steady suction on the teat.

OSCAR ANDERSON.

Witnesses:

MERLE R. BURKHART, l/VILBUR MORSE.

